EP1312516B1 - Front structure of a vehicle and protection of the pedestrian in case of frontal crash - Google Patents
Front structure of a vehicle and protection of the pedestrian in case of frontal crash Download PDFInfo
- Publication number
- EP1312516B1 EP1312516B1 EP02025141A EP02025141A EP1312516B1 EP 1312516 B1 EP1312516 B1 EP 1312516B1 EP 02025141 A EP02025141 A EP 02025141A EP 02025141 A EP02025141 A EP 02025141A EP 1312516 B1 EP1312516 B1 EP 1312516B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wings
- bonnet
- pedestrian
- vehicle
- front structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000002787 reinforcement Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 4
- 238000002788 crimping Methods 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 230000003466 anti-cipated effect Effects 0.000 abstract 1
- 230000035939 shock Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
- B60R2021/343—Protecting non-occupants of a vehicle, e.g. pedestrians using deformable body panel, bodywork or components
Definitions
- the present invention relates to a front structure of a motor vehicle intended to allow the protection of the pedestrian in the event of a frontal impact with said vehicle.
- It relates more particularly to an arrangement of the wings and the hood of the front structure of a motor vehicle to reduce the consequences for a pedestrian in a frontal impact with a motor vehicle and in particular the impact of the head on the hood.
- a pedestrian protection device consisting of an active cover may be raised by lifting means triggered by detection means of an impact so as to have before collision a race for absorbing the energy of the head shock.
- Such a device is satisfactory but requires a significant modification of the structure and a relatively high cost.
- the object of the invention is to provide a front structure of a motor vehicle that solves all or part of the aforementioned drawbacks.
- the subject of the present invention is a front structure of a motor vehicle intended to enable the protection of the pedestrian in the event of a frontal collision with said vehicle, consisting in part of an articulated hood comprising an inner and outer skin and of two wings. arranged symmetrically with respect to said hood, characterized in that each of the wings is shaped to open laterally towards the outside of the vehicle under a vertical force at least equal to 300 Newtons applied to the hood thus allowing vertical sliding of said hood between the wings each of the wings having a contact plane having an angle of inclination with respect to a vertical plane and directed inwardly of the engine compartment, up to a maximum angle of the order of 40 degrees thus initiating the sliding of the hood inside said wings.
- each of the wings comprises a cockpit side reinforcement located at a distance D minimum equal to 80 mm with respect to the inner skin of the hood thus providing an absorption stroke of the energy generated by the shock. of the head of the pedestrian overturned.
- the inner and outer skins of the cowl are connected by crimping in a substantially horizontal plane located in line with the plane of contact of the wings.
- the wings are made of a softer material than the cover for example plastic.
- FIG. 1 shows the classic front structure 1 of a motor vehicle, in particular the arrangement of the wings 2 and of the cover 3. It can be seen in this FIG. 1, an articulated cover 3 in a conventional manner either in the upper part allowing its opening from the front, or in the lower part allowing its opening from the rear bearing on bonnet stops of conventional type (not shown).
- the cover 3 consists of an inner skin 5 and an outer skin 6 welded to each other by a vertical weld plane P located near the contact plane 4 of the wing 2.
- each of the wings 2 is further provided with a wing lining 7 and a cockpit side reinforcement 8 disposed substantially in the vicinity of the contact plane 4 of the wing 2, conventionally substantially from the order of 20 mm of the inner skin 5 of the hood 3.
- each of the wings 2 according to the present invention is shaped to open laterally towards the outside of the vehicle under a vertical force of at least 300 Newtons applied on the cover 3 thus allowing vertical sliding of said cover 3 between the wings 2.
- each of the contact surfaces 4 of the wings 2 has an angle of inclination ⁇ with respect to a vertical plane Q and directed towards the inside of the engine compartment, up to a maximum angle of the order of 40 degrees thus making it possible to initiate the sliding of the cover 3 inside the wings 2.
- each wing 2 is located at a minimum distance D equal to 80 mm with respect to the inner skin 5 of the hood 3, thus offering an absorption stroke of the energy of the head impact . It is understood, unlike the conventional solution, that the cockpit side reinforcement 8 which constitutes a rigid piece is lowered.
- this lowering of the cockpit side reinforcements 8 can be compensated by an increase in the section inertia of said reinforcements thus providing the same structural characteristics to these reinforcements.
- the inner skins 5 and outer 6 of the cover 3 are connected by crimping S in a substantially horizontal plane located in line with the contact plane 4 of the wings 2 to avoid, unlike the solutions of the state of the prior art ( Figure 1), a deformation of the cover 3 at the junction of the skins 5 and 6 vertically towards the rigid parts faster than the surface of the skins themselves.
- the wings 2 are made of a softer material than the cover 3, for example made of plastic.
- the present invention thus proposes a new design of connection hood and peripheral parts which ensures a crush rating of the hood and flexibility of the supports.
- the structure according to the invention is not likely to be triggered unexpectedly.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Superstructure Of Vehicle (AREA)
- Body Structure For Vehicles (AREA)
- Automotive Seat Belt Assembly (AREA)
- Air Bags (AREA)
Abstract
Description
La présente invention concerne une structure avant d'un véhicule automobile destinée à permettre la protection du piéton en cas de choc frontal avec ledit véhicule.The present invention relates to a front structure of a motor vehicle intended to allow the protection of the pedestrian in the event of a frontal impact with said vehicle.
Elle se rapport plus particulièrement à un agencement des ailes et du capot de la structure avant d'un véhicule automobile afin de permettre de diminuer les conséquences pour un piéton lors d'un choc frontal avec un véhicule automobile et notamment du choc de la tête sur le capot.It relates more particularly to an arrangement of the wings and the hood of the front structure of a motor vehicle to reduce the consequences for a pedestrian in a frontal impact with a motor vehicle and in particular the impact of the head on the hood.
En effet, on a constaté que lors d'un tel choc, la tête du piéton heurte généralement violemment le capot entraînant une déformation du capot jusqu'à la rencontre d'éléments rigides tels que la batterie ou la structure, constituant la cause principale du décès du piéton. En cas de choc sur la périphérie du capot, celui-ci vient rapidement interférer avec la structure, ce qui le rend très agressif et cause des lésions importantes sur le piéton.Indeed, it has been found that during such an impact, the head of the pedestrian generally violently hits the hood resulting in a deformation of the hood until the meeting of rigid elements such as the battery or the structure, constituting the main cause of the death of the pedestrian. In case of shock on the periphery of the hood, it quickly interferes with the structure, which makes it very aggressive and causes significant damage to the pedestrian.
On connaît déjà dans l'état de la technique antérieure notamment par le brevet FR-A-2 772 700 un dispositif de protection des piétons constitué d'un capot actif susceptible d'être relevé par des moyens de levage déclenchés par des moyens de détection d'un impact afin de disposer ainsi avant collision d'une course d'absorption de l'énergie du choc tête.Already known in the state of the prior art including the FR-A-2 772 700 a pedestrian protection device consisting of an active cover may be raised by lifting means triggered by detection means of an impact so as to have before collision a race for absorbing the energy of the head shock.
Un tel dispositif donne satisfaction mais nécessite une modification importante de la structure ainsi qu'un coût relativement élevé.Such a device is satisfactory but requires a significant modification of the structure and a relatively high cost.
Le but de l'invention est de proposer une structure avant de véhicule automobile qui permet de résoudre tout ou partie des inconvénients précités.The object of the invention is to provide a front structure of a motor vehicle that solves all or part of the aforementioned drawbacks.
A cet effet, la présente invention a pour objet une structure avant de véhicule automobile destinée à permettre la protection du piéton en cas de choc frontal avec ledit véhicule, constituée en partie d'un capot articulé comprenant une peau intérieure et extérieure et de deux ailes disposées de manière symétrique par rapport audit capot, caractérisée en ce que chacune des ailes est conformée pour s'ouvrir latéralement vers l'extérieur du véhicule sous un effort vertical au moins égal à 300 Newtons appliqué sur le capot permettant ainsi un coulissement vertical dudit capot entre les ailes chacune des ailes comportant un plan de contact présentant un angle d'inclinaison par rapport à un plan vertical et dirigé vers l'intérieur du compartiment moteur, pouvant aller jusqu'à un angle maximal de l'ordre de 40 degrés permettant ainsi d'initier le coulissement du capot à l'intérieur desdites ailes.For this purpose, the subject of the present invention is a front structure of a motor vehicle intended to enable the protection of the pedestrian in the event of a frontal collision with said vehicle, consisting in part of an articulated hood comprising an inner and outer skin and of two wings. arranged symmetrically with respect to said hood, characterized in that each of the wings is shaped to open laterally towards the outside of the vehicle under a vertical force at least equal to 300 Newtons applied to the hood thus allowing vertical sliding of said hood between the wings each of the wings having a contact plane having an angle of inclination with respect to a vertical plane and directed inwardly of the engine compartment, up to a maximum angle of the order of 40 degrees thus initiating the sliding of the hood inside said wings.
Toujours selon l'invention, chacune des ailes comporte un renfort de côté d'habitacle situé à une distance D minimale égale à 80 mm par rapport à la peau intérieure du capot offrant ainsi une course d'absorption de l'énergie engendrée par le choc de la tête du piéton renversé.Still according to the invention, each of the wings comprises a cockpit side reinforcement located at a distance D minimum equal to 80 mm with respect to the inner skin of the hood thus providing an absorption stroke of the energy generated by the shock. of the head of the pedestrian overturned.
Selon une disposition avantageuse, les peaux intérieure et extérieure du capot sont reliées par sertissage selon un plan sensiblement horizontal situé au droit du plan de contact des ailes.According to an advantageous arrangement, the inner and outer skins of the cowl are connected by crimping in a substantially horizontal plane located in line with the plane of contact of the wings.
Selon une autre disposition avantageuse, les ailes sont réalisées dans un matériau plus souple que le capot par exemple en matière plastique.According to another advantageous arrangement, the wings are made of a softer material than the cover for example plastic.
Les caractéristiques de l'invention mentionnées ci-dessus, ainsi que d'autres, apparaîtront plus clairement à la lecture de la description suivante d'un exemple de réalisation, en se référant aux dessins annexés sur lesquels :
- la figure 1 est une vue en coupe transversale d'un côté d'une structure avant selon l'art antérieur d'un véhicule automobile,
- la figure 2 est une vue en coupe transversale d'un côté d'une structure avant d'un véhicule automobile selon l'invention, représenté avant une collision avec un piéton, et
- la figure 3 est une vue en coupe transversale similaire à la figure 1 représenté après une collision avec un piéton.
- FIG. 1 is a cross-sectional view of one side of a front structure according to the prior art of a motor vehicle,
- FIG. 2 is a cross-sectional view of one side of a front structure of a motor vehicle according to the invention, represented before a collision with a pedestrian, and
- Figure 3 is a cross-sectional view similar to Figure 1 shown after a collision with a pedestrian.
On a représenté à la figure 1, la structure avant 1 classique d'un véhicule automobile en particulier l'agencement des ailes 2 et du capot 3. On peut voir sur cette figure 1, un capot articulé 3 de manière classique soit en partie supérieure permettant son ouverture par l'avant, soit en partie inférieure permettant son ouverture par l'arrière prenant appui sur des butées de capot de type classique (non représentées).FIG. 1 shows the classic front structure 1 of a motor vehicle, in particular the arrangement of the wings 2 and of the
Le capot 3 est constitué d'une peau intérieure 5 et d'une peau extérieure 6 soudées l'une à l'autre par un plan de soudure P verticale situé à proximité du plan de contact 4 de l'aile 2.The
De même, chacune des ailes 2 est en outre pourvue d'une doublure d'aile 7 et d'un renfort de côté d'habitacle 8 disposé sensiblement au voisinage du plan de contact 4 de l'aile 2, de manière classique sensiblement de l'ordre de 20 mm de la peau intérieure 5 du capot 3.Similarly, each of the wings 2 is further provided with a wing lining 7 and a
Les analyses des différentes collisions entre un piéton et un véhicule ont démontré que le plan de soudure P des peaux intérieure 5 et extérieure 6 se déplaçait verticalement jusqu'au contact avec les renforts de côté d'habitacle 8 qui constituent un élément sous capot rigide et par conséquent limitait la course d'absorption du choc du piéton et présentait donc un risque de décès important.The analyzes of the different collisions between a pedestrian and a vehicle have demonstrated that the weld plane P of the inner and
Dans un souci de simplification de la description de la présente invention, les éléments identiques à l'état de l'art antérieur décrit ci-dessus sont suivis de la même référence numérique.For the sake of simplification of the description of the present invention, the elements identical to the state of the prior art described above are followed by the same reference numeral.
Afin de résoudre ce problème de déformation du capot 3 en cas de collision frontale avec un piéton, chacune des ailes 2 selon la présente invention est conformée pour s'ouvrir latéralement vers l'extérieur du véhicule sous un effort vertical au moins égal à 300 Newtons appliqué sur le capot 3 permettant ainsi un coulissement vertical dudit capot 3 entre les ailes 2.In order to solve this problem of deformation of the
Pour ce faire, chacun des plans de contact 4 des ailes 2 présente un angle d'inclinaison α par rapport à un plan vertical Q et dirigé vers l'intérieur du compartiment moteur, pouvant aller jusqu'à un angle maximal de l'ordre de 40 degrés permettant ainsi d'initier le coulissement du capot 3 à l'intérieur des ailes 2.To do this, each of the contact surfaces 4 of the wings 2 has an angle of inclination α with respect to a vertical plane Q and directed towards the inside of the engine compartment, up to a maximum angle of the order of 40 degrees thus making it possible to initiate the sliding of the
Par ailleurs, le renfort de côté d'habitacle 8 de chaque aile 2 est situé à une distance D minimale égale à 80 mm par rapport à la peau intérieure 5 du capot 3 offrant ainsi une course d'absorption de l'énergie du choc tête. On comprend, contrairement à la solution classique, que le renfort de côté d'habitacle 8 qui constitue une pièce rigide est abaissé.Furthermore, the
De manière préférentielle, cet abaissement des renforts de côté d'habitacle 8 peut être compensé par une augmentation de l'inertie de section desdits renforts offrant ainsi les mêmes caractéristiques structurelles à ces renforts.Preferably, this lowering of the
En outre, de manière avantageuse les peaux intérieure 5 et extérieure 6 du capot 3 sont reliées par sertissage S selon un plan sensiblement horizontal situé au droit du plan de contact 4 des ailes 2 permettant d'éviter, contrairement aux solutions de l'état de la technique antérieure (figure 1), une déformation du capot 3 au niveau de la jonction des peaux 5 et 6 verticalement en direction des pièces rigides plus rapide que la surface des peaux elles-mêmes.In addition, advantageously the
Selon un mode de réalisation préférentiel, les ailes 2 sont réalisées dans un matériau plus souple que le capot 3 par exemple en matière plastique.According to a preferred embodiment, the wings 2 are made of a softer material than the
On décrira maintenant en référence notamment à la figure 3 les différentes phases de déformation de la structure avant selon la présente invention permettant de dissiper l'énergie engendrée par le choc de la tête notamment.We will now describe with reference in particular to Figure 3 the different phases of deformation of the front structure according to the present invention to dissipate the energy generated by the impact of the head in particular.
Ainsi, lors d'un choc piéton, la tête de ce dernier vient en premier en collision avec le capot 3 qui sous cet effort se déforme et se déplace vers le bas. L'effort que ce capot 3 exerce par l'intermédiaire des plans de contact 4 des ailes 2 entraîne une flexion vers l'extérieur desdites ailes 2 et par voie de conséquence un coulissement vertical à l'intérieur des ailes 2 selon une distance au minimum égale à 80 mm jusqu'au contact avec le renfort de côté d'habitacle 8.Thus, during a pedestrian impact, the head of the latter comes first colliding with the
On notera que cette distance de 80 mm permet un gain notable en protection des piétons.Note that this distance of 80 mm allows a significant gain in pedestrian protection.
On comprend à la lecture de la description ci-dessus que la structure selon l'invention permet de conserver une architecture classique contrairement au dispositif de l'état de la technique antérieure et est relativement simple à mettre en oeuvre, d'une grande efficacité et assurant une parfaite sécurité.It is understood from reading the description above that the structure according to the invention makes it possible to maintain a conventional architecture unlike the device of the state of the prior art and is relatively simple to implement, of great efficiency and ensuring perfect security.
La présente invention propose ainsi une nouvelle conception de liaison capot et pièces périphériques qui assure une cote d'écrasement du capot et une souplesse des appuis. En outre la structure selon l'invention ne risque pas d'être déclenchée intempestivementThe present invention thus proposes a new design of connection hood and peripheral parts which ensures a crush rating of the hood and flexibility of the supports. In addition, the structure according to the invention is not likely to be triggered unexpectedly.
Bien que l'invention ait été décrite en liaison avec un mode de réalisation particulier elle comprend tous les équivalents techniques des moyens décrits.Although the invention has been described in connection with a particular embodiment it includes all the technical equivalents of the means described.
Claims (4)
- Front structure of an automotive vehicle, said structure being intended to permit the pedestrian to be protected in the case of frontal impact with said vehicle and being made up, in part, of a hinged bonnet (3) comprising an inner skin (5) and an outer skin (6) and two wings (2), disposed in a symmetrical manner relative to said bonnet (3), characterised in that each of the wings (2) is designed to open laterally towards the exterior of the vehicle under a vertical force at least equal to 300 Newtons applied on the bonnet (3), thus permitting a vertical sliding of said bonnet (3) between the wings (2), and in that each of the wings (2) includes a contact plane (4), which has an angle of inclination (α) relative to a vertical plane (Q) and is directed towards the interior of the engine compartment, so that it is able to attain a maximum angle in the order of 40 degrees, thus permitting the sliding of the bonnet (3) to the interior of said wings (2) to be initiated.
- Front structure according to claim 1, characterised in that each of the wings (2) includes a side reinforcement of the cab (8), situated at a minimum distance D equal to 80 mm relative to the inner skin (5) of the bonnet (3), thus offering a path for absorbing the energy caused by the impact of the head of the pedestrian who has been knocked-over.
- Front structure according to claim 1 or 2, characterised in that the inner skin (5) and the outer skin (6) of the bonnet (3) are connected by crimping along a substantially horizontal plane situated at right angles to the plane of contact (4) of the wings (2).
- Structure according to any of the preceding claims, characterised in that the wings (2) are formed from a more flexible material than the bonnet (3), for example they are formed from plastics material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0114806A FR2832373B1 (en) | 2001-11-16 | 2001-11-16 | FRONT STRUCTURE OF A MOTOR VEHICLE FOR ENABLING PROTECTION OF THE PEDESTRIAN IN THE EVENT OF A FRONTAL SHOCK WITH SAID VEHICLE |
| FR0114806 | 2001-11-16 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1312516A2 EP1312516A2 (en) | 2003-05-21 |
| EP1312516A3 EP1312516A3 (en) | 2004-08-18 |
| EP1312516B1 true EP1312516B1 (en) | 2006-04-05 |
Family
ID=8869448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02025141A Expired - Lifetime EP1312516B1 (en) | 2001-11-16 | 2002-11-09 | Front structure of a vehicle and protection of the pedestrian in case of frontal crash |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1312516B1 (en) |
| AT (1) | ATE322411T1 (en) |
| DE (1) | DE60210395T2 (en) |
| ES (1) | ES2259356T3 (en) |
| FR (1) | FR2832373B1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2772700B1 (en) * | 1997-12-19 | 2000-02-04 | Peugeot | METHOD FOR PROTECTING PEDESTRIANS IN THE EVENT OF A FRONTAL IMPACT WITH A MOTOR VEHICLE AND DEVICE FOR IMPLEMENTING THE METHOD |
| DE19948461A1 (en) * | 1999-10-08 | 2001-05-23 | Edscha Ag | Front hood assembly for motor vehicle has multijoint hinge with connecting rod which pivot front hood to chassis, such that connecting rod varies in length under collision impact |
| DE19948732A1 (en) * | 1999-10-09 | 2001-04-12 | Volkswagen Ag | Pedestrian-friendly motor vehicle front end |
-
2001
- 2001-11-16 FR FR0114806A patent/FR2832373B1/en not_active Expired - Fee Related
-
2002
- 2002-11-09 ES ES02025141T patent/ES2259356T3/en not_active Expired - Lifetime
- 2002-11-09 EP EP02025141A patent/EP1312516B1/en not_active Expired - Lifetime
- 2002-11-09 AT AT02025141T patent/ATE322411T1/en not_active IP Right Cessation
- 2002-11-09 DE DE60210395T patent/DE60210395T2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1312516A3 (en) | 2004-08-18 |
| ATE322411T1 (en) | 2006-04-15 |
| DE60210395T2 (en) | 2007-01-11 |
| FR2832373A1 (en) | 2003-05-23 |
| EP1312516A2 (en) | 2003-05-21 |
| ES2259356T3 (en) | 2006-10-01 |
| FR2832373B1 (en) | 2003-12-19 |
| DE60210395D1 (en) | 2006-05-18 |
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